Machine for sawing metals.



Patented June 29, 1915.

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EDWIN OLAF ROTI-IMAN, OF LONDON, ENGLAND, ASSIGNOR TO SOGIETE I BURTONFILS, OF PARIS, FRANCE.

MACHINE FOR SAWIN'G METALS.

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TmzZZ 207mm it may concern:

Be it known that I, EDWIN OLAF ROTH- MAN, of 41 Great Percy street, inthe city of London, W. (3., England, have invented a Machine for SawingMetals, of which the following is a full, clear, and exact description.

The invention has for its object a portable sawing machine, capable ofbeing attached to a bench or any carrier, or on the piece.to be cutitself, allowing to cut square or obliquely and to vary at will thepressure with which the saw is applied, according to the size of thepiece and to the nature of the metal.

A method of carrying out the invention is illustrated, by way of examplein the accompanying drawing in which:

Figure 1 is an elevation of the said machine for sawing or cuttingmetals; Fig. 2 is an end view of the same. i

As illustrated in the drawing, the new machine comprises a frame (1having two arms 6 and 0 extending in perpendicular planes. The arm 6carries a screw 0 allowing to secure the machine on a bench d or on anysuitable carrier. The piece 6 to be out bears upon a carrier 7 havingany suitable shape. Said carrier f rests upon a table g of the frame a.This carrier 7 has a pivot 70 fitting in a corresponding recess providedin the table 9', which allows to set at will the piece to be out. Ascrew 7," operated by a hand wheel 7' allows of locking the carrier f inthe position chosen. A screw 70 on the arm 0 allows of clamping thepiece to be cut.

Instead of the machine beingmounted on a bench, or carrier, asillustrated, it may be simply attached to the piece 6 itself, by meansof the screw 70. In this case, the piece to be cut supports the machine.

The saw Z is mounted at one end of a lever m secured to the arm Z) bymeans of a trunnion n movable in a slot 0 of suitable shape. A rod 7)constitutes the extension of the other end of the lever m and on thisrod can move an adjustable weight 9. Instead of producing the pressureby means of said weight Q, the rod 7 may be acted upon simply by meansof the hand.

The saw is actuated by a ratchet wheel r mounted on the axis 8 of thesaw and driven by a pawl t on a crank u, or by any suitable leverloosely mounted on said axis 8.

On the carrier 7 and on its side slides a Patented June 29, 1915.

Application filed October 2, 1913. Serial No. 792,979.

rod 0 curved at its end; a set screw to can hold said rod stationary inthe required position and the piece to be cut abuts against this rod '0,when it is desired to obtain a series of pieces or portions of the samelength. The operation of the new machine is as follows :The frame abeing secured on the bench or carrier (Z by means of the screw 0, thepiece 6 to be out is placed on the carrier f which is set, by a suitablerotation about the pivot 72,, in the required position relatively to theplane of the saw. The carrier is then locked by means of the screw 2'.The rod o is adjusted to a length corresponding to that of the portionor portions it is desired to obtain and the piece to be cut is securedon the carrier by means of the upper set screw 70. The adgustabletrunnion n a is then released and moved in its slot until the saw takesa suitable position relatively to the piece e, according to the size ofthe piece or according to the place or point where it is desired toproduce the beginning of the cutting action of the saw; then thetrunnion n is locked. Finally a rotary motion is imparted to the saweither by the continuous movement of the crank 14, if its range ofaction is not obstructed by the eX- tension of the piece a, or, on thecontrary, by a reciprocating movement which is rendered possible by theprovision of the pawl wheel 1".

It will be seen that the present machine offers the main followingadvantages: easy attachment on any table or bench, or on the pieceitself; possibility of setting the cutting plane in any manner whateverand to vary the pressure of the saw; possibility of actuating themachine in a continuous or discontinuous manner, by hand ormechanically; finally possibility of cutting pieces of very differentsizes or to begin to saw one and the same piece at very different pointsor places.

The characteristic arrangements of the new machine are not onlyapplicable to the saws proper, but also to any machines provided withcircular cutting tools actuated by hand or mechanically.

The above arrangements are given by way of example only, the forms,sizes and detail devices may be varied according to circumstanceswithout modifying the principle of the invention as defined by theappended claims.

Claims:

1. In a machine for sawing metals, a cirframe having a curved slot inwhich said trunnion can move.

i. In a machine for sawing metals, a circular saw, a crank and a lockingmechanism for controlling the saw, a lever sup porting said saw, atrunnion on which pivots said lever, and a frame having a slot in whichsaid trunnion can move.

5. In a machine for sawing metals, a circular saw, a lever supportingsaid saw, a trunnion on which pivots said lever, a frame having a slotin which said trunnion can move, and an adjustable weight on the lever.

6. In a machine for sawing metals, a circular saw, a lever carrylng saidsaw, an arm with a screw for securing the machine on a bench, anotherarm in a plane perpendicular,

to that of the first-named arm, and a screw in the second-named arm forclamping the piece tobe cut.

7. In a machine for sawing metals, a circular' saw, rotating and slidinglever carrying said saw, ing the machine on a bench, another arm in aplane perpendicular to that of the firstnamed arm, and a screw in thesecond-named arm for clamping the piece to be cut.

8. In a machine for sawing metals, a circular saw, a rotating andsliding lever carryto be cut, and means for holding said carrierstationary.

The foregoing specification of my machine for sawing metals signed byme, this 16th day of September 1913. v

, EDW'IN OLAF ROTHM'AN. Witnesses? FnANoIs ABBEY GAnwoon,

WALTER BENJAMIN TURNER.

C-opies of this patent may be obtained for five cents each, byaddressing the f Commissioner of Patents,

Washington, I). G.

an arm with a screw for securlng said saw, a rotating carrier for thepiece

